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Finding the Fourth Proportional to 194.12, 290.75 and 121.62

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Solution

The fourth proportional to 194.12, 290.75 and 121.62 is: 182.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.12 : 290.75 = 121.62 : x
  2. Step 2: Convert to fraction form
    194.12/290.75 = 121.62/x
  3. Step 3: Cross multiply
    194.12x = 290.75 × 121.62
  4. Step 4: Simplify right side
    194.12x = 35,361.02
  5. Step 5: Solve for x
    x = 35,361.02/194.12
  6. Step 6: Final answer
    x = 182.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.